# Average with MNE: Memory Allocation Failed
**URL:** https://mne.discourse.group/t/average-with-mne-memory-allocation-failed/124
**Category:** Mailing List Archive (read-only)
**Tags:** list-archive
**Created:** [May 14, 2009, 5:33pm UTC](https://mne.discourse.group/t/average-with-mne-memory-allocation-failed/124 "2009-05-14T17:33:23Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [May 14, 2009, 5:33pm UTC](https://mne.discourse.group/t/average-with-mne-memory-allocation-failed/124/1 "2009-05-14T17:33:23Z")
Hello everyone,
I have a problem to average my data across subjects.
I have 7 files per subject of 750 Mo each and 7 subjects.
I tried mne\_process\_raw to average my data all together. At around the two
third of the process I have this error message : 'fiff\_read\_tag: memory
allocation failed'.
I tried to use the MNE matlab toolbox. I averaged my subjects separately and
then try to load the averages in Matlab to average all the subjects together
in matlab. But there also is a problem of memory while loading the data.
Does anybody have an idea of how I could solve this ?
Also, does anybody know how to save the terminal info while using the
mne\_process\_raw command ? I would like to know how many trials mne averaged
in each category and save it in a file.
Thanks in advance,
Lucie
2009/4/28 Matti Hamalainen \
> Hello all,
>
> Thanks to Fran?ois Tadel from USC and John Mosher from Cleveland Clinic,
> one major and a few minor bottlenecks were identified in the MNE Matlab
> Toolbox. I modified the code on the basis of their findings and, as a
> result, the fif file I/O is now much faster. I packaged the improved version
> as MNE Matlab 2.6.1 and this new version is now available on the download
> web site.
>
> This new package is highly recommended for those of you who use the MNE
> Matlab tools.
>
> The Martinos Center public MNE installation has been updated.
>
> Other users need to:
>
> 1. Download MNE-dist-matlab-2.6.1-090428065405.tar.gz from the MNE download
> web site.
>
> 2. Goto the directory \*containing\* $MNE\_ROOT, i.e., $MNE\_ROOT/..
>
> 3. Say
>
> tar zxvf \/MNE-dist-matlab-2.6.1-090428065405.tar.gz
>
> \ is the path to the directory where you downloaded
> the software.
>
> Best,
> Matti
>
> ---------
>
> Matti Hamalainen, Ph.D.
> Athinoula A. Martinos Center for Biomedical Imaging
> Massachusetts General Hospital
>
> msh at nmr.mgh.harvard.edu
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> Mne\_analysis mailing list
> Mne\_analysis at nmr.mgh.harvard.edu
> [https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne\_analysis](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis)
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### Author:  [@system](https://mne.discourse.group/u/system)
#### Post date: [May 14, 2009, 8:00pm UTC](https://mne.discourse.group/t/average-with-mne-memory-allocation-failed/124/2 "2009-05-14T20:00:08Z")
Hi Lucie,
See some replies in text.
> Hello everyone,
>
> I have a problem to average my data across subjects.
> I have 7 files per subject of 750 Mo each and 7 subjects.
> I tried mne\_process\_raw to average my data all together. At around
> the two third of the process I have this error message :
> 'fiff\_read\_tag: memory allocation failed'.
> I tried to use the MNE matlab toolbox. I averaged my subjects
> separately and then try to load the averages in Matlab to average
> all the subjects together in matlab. But there also is a problem of
> memory while loading the data.
>
> Does anybody have an idea of how I could solve this ?
Load them one at a time i.e.
data=fiff\_read\_evoked('subject1')
for i=2:6)
data2=fiff\_read\_evoked(['subject' i])
data.evoked=data.evoked+data2.evoked;
end
data.evoked=data.evoked./7;
> Also, does anybody know how to save the terminal info while using
> the mne\_process\_raw command ? I would like to know how many trials
> mne averaged in each category and save it in a file.
Lucie this is already in both the fif file and in the log file
generated by mne\_process\_raw.
> Thanks in advance,
>
> Lucie
>
> 2009/4/28 Matti Hamalainen \
>
> Hello all,
>
> Thanks to Fran?ois Tadel from USC and John Mosher from Cleveland
> Clinic, one major and a few minor bottlenecks were identified in
> the MNE Matlab Toolbox. I modified the code on the basis of their
> findings and, as a result, the fif file I/O is now much faster. I
> packaged the improved version as MNE Matlab 2.6.1 and this new
> version is now available on the download web site.
>
> This new package is highly recommended for those of you who use the
> MNE Matlab tools.
>
> The Martinos Center public MNE installation has been updated.
>
> Other users need to:
>
> 1. Download MNE-dist-matlab-2.6.1-090428065405.tar.gz from the MNE
> download web site.
>
> 2. Goto the directory \*containing\* $MNE\_ROOT, i.e., $MNE\_ROOT/..
>
> 3. Say
>
> tar zxvf \/MNE-dist-
> matlab-2.6.1-090428065405.tar.gz
>
> \ is the path to the directory where you
> downloaded the software.
>
> Best,
> Matti
>
> ---------
>
> Matti Hamalainen, Ph.D.
> Athinoula A. Martinos Center for Biomedical Imaging
> Massachusetts General Hospital
>
> msh at nmr.mgh.harvard.edu
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> Mne\_analysis mailing list
> Mne\_analysis at nmr.mgh.harvard.edu
> [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis)
>
> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_
> Mne\_analysis mailing list
> Mne\_analysis at nmr.mgh.harvard.edu
> [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis)
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